Temperature and its Measurement — Question 20

The highest temperature a laboratory thermometer can measure is 110 °C.
So the range of this thermometer is from-10 °C to 110 °C.
Activity 7.7: Let us Analyse (Page 134)
Read or listen to the weather reports for a place for 10 successive days.
Record the .maximum and minimum air temperature for each day in Table.
Analyse the data in the Table.
Answer:
Table: Maximum and minimum air temperature in New Delhi
Date
Maximum air Temperature
Minimum air Temperature
14 July, 2024
40 °C
34 °C
15 July, 2024
39 °C
34 °C
16 July, 2024
38 °C
31 °C
17 July, 2024
40 °C
32 °C
18 July, 2024
39 °C
31 °C
19 July, 2024
36 °C
30 °C
20 July, 2024
38 °C
30 °C
21 July, 2024
38 °C
31 °C
22 July, 2024
38 °C
31 °C
23 July, 2024
35 °C
29 °C
Analysis: From the analysis of the data on temperatures we observe that:
The maximum and minimum temperatures keep changing day to day.
The gap between the maximum and minimum temperatures in New Delhi in these ten days varied from 5 to 8 °C.
The highest temperature during these 10 days in New Delhi was noted at 40 °C.
The lowest temperature during these 10 days in New Delhi was notedjat 29 °C.
Both maximum and minimum temperatures during these 10 days in New . Delhi were the lowest on 23 July, 2024.
NCERT Solutions for Class 6 Science Chapter 7 Getting to Know Plants
Topics and Sub Topics in Class 6 Science Chapter 7 Getting to Know Plants:
Section Name
Topic Name
7
Getting to Know Plants
7.1
Herbs, Shrubs and Trees
7.2
Stem
7.3
Leaf
7.4
Root
7.5
Flower
Class 6 Science Chapter 7 Textbook Questions Solved
1. Correct the following statements and rewrite them in your notebook.
(a) Stem absorbs water and minerals from the soil.
(b) Leaves hold the plant upright.
(c) Roots conduct water to the leaves.
(d) The number of sepals and petals in a flower is always equal.
(e) If the sepals of a flower are joined together, its petals are also joined together,
(f) If the petals of a flower are joined together, then the pistil is joined to the petal.
Ans:
(a) Roots absorb water and minerals from the soil.
(b) Roots hold the plant upright.
(c) Stem conducts water to the leaves.
(d) The number of petals and sepals in a flower is usually equal.
(e) If the sepals of a flower are joined together, its petals are not necessarily joined together.
(f) If the petals of a flower are joined together, then the pistil is not necessarily joined to the petal.
2. Draw (a) a leaf, (b) a tap root and (c) a flower, you have studied for Table 7.3 of the textbook.
Ans:
3. Can you find a plant in your house or in your neighbourhood which has a long but a weak stem? Write its name. In which category would you classify it?
Ans: Yes, we find a money plant in our house. It is a climber.
4. What is the function of a stem in a plant?
Ans: A stem performs following functions:
(i) The stem and its branches hold leaves to get maximum sunlight.
(ii) It transports water from roots to different parts of the plant.
(iii) It transports food from leaves to different parts of the plant.
(iv) It bears leaves, flowers and fruits.
5. Which of the following leaves have reticulate venation?
Wheat, tulsi, maize, grass, coriander (dhania), china rose.
Ans: Tulsi, china rose.
6. If a plant has fibrous root, what type of venation are its leaves likely to have?
Ans: Parallel venation.
7. If a plant has leaves with reticulate venation, what kind of roots will it have?
Ans:Tap root.
8. Is it possible for you to recognise the leaves without seeing them? How?
Ans: We cannot exactly recognise the leaves without seeing them. We may be able to have some idea by touching and smelling them.
9. Write the names of the parts of a flower in sequence, from outside to inside.
Ans: The names of various parts of a flower from outside to inside are:
(i) Sepals
(ii) Petals
(iii) Stamens
(iv) Pistil
10. Which of the following plants have you seen? Of those that you have seen, which one have flowers?
Grass, maize, wheat, chilli, tomato, tulsi, pipal, shisham, banyan, mango, jamun, guava, pomegranate, papaya, banana, lemon, sugarcane, potato, groundnut
Ans:
11. Name the part of the plant which produces its food. Name this process.
Ans: Leaves produce food for the plant. This process is called photosynthesis.
12. In which part of a flower you are likely to find the ovary?
Ans: We find ovary in pistil. It is the lowermost part of the pistil.
13. Name two flowers, each with joined and separates sepals.
Ans:
Flowers with joined sepals:
(i) Datura
(ii) Loki
Flowers with separate sepals:
(i) Gurhal
(ii) Mustard
EXTRA QUESTIONS for Class 6 Science Chapter 7
Class 6 Science Chapter 7 VERY SHORT ANSWER TYPE QUESTIONS
1. List few plants found around your house.
Ans:  Mango, neem, grass, chilli, palak and banyan tree.
2. Are all the plants same in size?
Ans: No, all plants are of different sizes.
3. What are the major parts of plants?
Ans: Stem, root, leaves and flowers.
4. How many kinds of plants are there?
Ans: There are three kinds of plants:
(i) Herbs
(ii) Shrubs
(iii) Trees
5. Name two plants that belong to herbs.
Ans:
(i) Tomato
(ii) Potato
6. Give two examples of shrubs.
Ans:
(i) Lemon
(ii) Orange
7. Give two examples of trees.
Ans:
(i) Mango
(ii) Neem
8. Define petiole.
Ans: The part (stalk) of a leaf by which it is attached to the stem is called petiole.
9. What is lamina?
Ans:  The broad green flat part of leaf is called lamina.
10. What are veins?
Ans:  The lines on the leaf are called veins.
11. What is midrib?
Ans: A thick vein in the middle of the leaf is called midrib.
12. What is leaf venation?
Ans: The design made by veins in a leaf is called leaf venation.
13. How many types of leaf venation are there?
Ans: There are two types of leaf venation:
(i)  Reticulate venation
(ii)   Parallel venation
14. What is transpiration?
Ans: The process by which water comes out from the leaves in the form of vapour is called transpiration.
15. Name the process by which leaves can prepare their food.
Ans: This process is called photosynthesis.
16. What are the raw materials for photosynthesis?
Ans:
(i)    Sunlight
(ii)  Water
(iii) Carbon dioxide
(iv)   Chlorophyll
17. Where does the photosynthesis take place in plants?
Ans: It takes place in the leaves.
18.  Name the part of plant which helps in holding the plant in the soil.
Ans: Roots.
19. Name the types of roots shown in the Fig. 7.7.
Ans: (i) Tap roots (ii) Fibrous roots
20. What are tap roots?
Ans: The roots in which one root is main root and other lateral roots grow on it are called tap roots.
21. Give names of two plants which have tap root.
Ans: Gram and mustard.